Phys. Rev. D
80,
052011
(2009)
[17 pages]
Search for hadronic decays of W and Z bosons in photon events in pp̅ collisions at √s=1.96 TeV
T. Aaltonen et al. CDF Collaboration
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T. Aaltonen23, J. Adelman13, T. Akimoto54, M. G. Albrow17, B. Álvarez González11, S. Amerio42, D. Amidei34, A. Anastassov51, A. Annovi19, J. Antos14, M. Aoki24, G. Apollinari17, A. Apresyan47, T. Arisawa56, A. Artikov15, W. Ashmanskas17, A. Attal3, A. Aurisano52, F. Azfar41, P. Azzi-Bacchetta42, P. Azzurri45, N. Bacchetta42, W. Badgett17, A. Barbaro-Galtieri28, V. E. Barnes47, B. A. Barnett25, S. Baroiant7, V. Bartsch30, G. Bauer32, P.-H. Beauchemin33, F. Bedeschi45, P. Bednar14, S. Behari25, G. Bellettini45, J. Bellinger58, A. Belloni22, D. Benjamin16, A. Beretvas17, J. Beringer28, T. Berry29, A. Bhatti49, M. Binkley17, D. Bisello42, I. Bizjak30, R. E. Blair2, C. Blocker6, B. Blumenfeld25, A. Bocci16, A. Bodek48, V. Boisvert48, G. Bolla47, A. Bolshov32, D. Bortoletto47, J. Boudreau46, A. Boveia10, B. Brau10, A. Bridgeman24, L. Brigliadori5, C. Bromberg35, E. Brubaker13, J. Budagov15, H. S. Budd48, S. Budd24, K. Burkett17, G. Busetto42, P. Bussey21, A. Buzatu33, K. L. Byrum2, S. Cabrera16,l, M. Campanelli35, M. Campbell34, F. Canelli17, A. Canepa44, D. Carlsmith58, R. Carosi45, S. Carrillo18,f, S. Carron33, B. Casal11, M. Casarsa17, A. Castro5, P. Catastini45, D. Cauz53, M. Cavalli-Sforza3, A. Cerri28, L. Cerrito30,j, S. H. Chang27, Y. C. Chen1, M. Chertok7, G. Chiarelli45, G. Chlachidze17, F. Chlebana17, K. Cho27, D. Chokheli15, J. P. Chou22, G. Choudalakis32, S. H. Chuang51, K. Chung12, W. H. Chung58, Y. S. Chung48, C. I. Ciobanu24, M. A. Ciocci45, A. Clark20, D. Clark6, G. Compostella42, M. E. Convery17, J. Conway7, B. Cooper30, K. Copic34, M. Cordelli19, G. Cortiana42, F. Crescioli45, C. Cuenca Almenar7,l, J. Cuevas11,i, R. Culbertson17, J. C. Cully34, D. Dagenhart17, M. Datta17, T. Davies21, P. de Barbaro48, S. De Cecco50, A. Deisher28, G. De Lentdecker48,**, G. De Lorenzo3, M. Dell’Orso45, L. Demortier49, J. Deng16, M. Deninno5, D. De Pedis50, P. F. Derwent17, G. P. Di Giovanni43, C. Dionisi50, B. Di Ruzza53, J. R. Dittmann4, M. D’Onofrio3, S. Donati45, P. Dong8, J. Donini42, T. Dorigo42, S. Dube51, J. Efron38, R. Erbacher7, D. Errede24, S. Errede24, R. Eusebi17, H. C. Fang28, S. Farrington29, W. T. Fedorko13, R. G. Feild59, M. Feindt26, J. P. Fernandez31, C. Ferrazza45, R. Field18, G. Flanagan47, R. Forrest7, S. Forrester7, M. Franklin22, J. C. Freeman28, I. Furic18, M. Gallinaro49, J. Galyardt12, F. Garberson10, J. E. Garcia45, A. F. Garfinkel47, K. Genser17, H. Gerberich24, D. Gerdes34, S. Giagu50, V. Giakoumopolou45,†, P. Giannetti45, K. Gibson46, J. L. Gimmell48, C. M. Ginsburg17, N. Giokaris15,†, M. Giordani53, P. Giromini19, M. Giunta45, V. Glagolev15, D. Glenzinski17, M. Gold36, N. Goldschmidt18, A. Golossanov17, G. Gomez11, G. Gomez-Ceballos32, M. Goncharov52, O. González31, I. Gorelov36, A. T. Goshaw16, K. Goulianos49, A. Gresele42, S. Grinstein22, C. Grosso-Pilcher13, R. C. Group17, U. Grundler24, J. Guimaraes da Costa22, Z. Gunay-Unalan35, C. Haber28, K. Hahn32, S. R. Hahn17, E. Halkiadakis51, A. Hamilton20, B.-Y. Han48, J. Y. Han48, R. Handler58, F. Happacher19, K. Hara54, D. Hare51, M. Hare55, S. Harper41, R. F. Harr57, R. M. Harris17, M. Hartz46, K. Hatakeyama49, J. Hauser8, C. Hays41, M. Heck26, A. Heijboer44, B. Heinemann28, J. Heinrich44, C. Henderson32, M. Herndon58, J. Heuser26, S. Hewamanage4, D. Hidas16, C. S. Hill10,§, D. Hirschbuehl26, A. Hocker17, S. Hou1, M. Houlden29, S.-C. Hsu9, B. T. Huffman41, R. E. Hughes38, U. Husemann59, J. Huston35, J. Incandela10, G. Introzzi45, M. Iori50, A. Ivanov7, B. Iyutin32, E. James17, B. Jayatilaka16, D. Jeans50, E. J. Jeon27, S. Jindariani18, W. Johnson7, M. Jones47, K. K. Joo27, S. Y. Jun12, J. E. Jung27, T. R. Junk24, T. Kamon52, D. Kar18, P. E. Karchin57, Y. Kato40, R. Kephart17, U. Kerzel26, V. Khotilovich52, B. Kilminster38, D. H. Kim27, H. S. Kim27, J. E. Kim27, M. J. Kim17, S. B. Kim27, S. H. Kim54, Y. K. Kim13, N. Kimura54, L. Kirsch6, S. Klimenko18, M. Klute32, B. Knuteson32, B. R. Ko16, S. A. Koay10, K. Kondo56, D. J. Kong27, J. Konigsberg18, A. Korytov18, A. V. Kotwal16, J. Kraus24, M. Kreps26, J. Kroll44, N. Krumnack4, M. Kruse16, V. Krutelyov10, T. Kubo54, S. E. Kuhlmann2, T. Kuhr26, N. P. Kulkarni57, Y. Kusakabe56, S. Kwang13, A. T. Laasanen47, S. Lai33, S. Lami45, S. Lammel17, M. Lancaster30, R. L. Lander7, K. Lannon38, A. Lath51, G. Latino45, I. Lazzizzera42, T. LeCompte2, J. Lee48, J. Lee27, Y. J. Lee27, S. W. Lee52,k, R. Lefèvre20, N. Leonardo32, S. Leone45, S. Levy13, J. D. Lewis17, C. Lin59, C. S. Lin28, J. Linacre41, M. Lindgren17, E. Lipeles9, A. Lister7, D. O. Litvintsev17, T. Liu17, N. S. Lockyer44, A. Loginov59, M. Loreti42, L. Lovas14, R.-S. Lu1, D. Lucchesi42, J. Lueck26, C. Luci50, P. Lujan28, P. Lukens17, G. Lungu18, L. Lyons41, J. Lys28, R. Lysak14, E. Lytken47, P. Mack26, D. MacQueen33, R. Madrak17, K. Maeshima17, K. Makhoul32, T. Maki23, P. Maksimovic25, S. Malde41, S. Malik30, G. Manca29, A. Manousakis15,†, F. Margaroli47, C. Marino26, C. P. Marino24, A. Martin59, M. Martin25, V. Martin21,d, M. Martínez3, R. Martínez-Ballarín31, T. Maruyama54, P. Mastrandrea50, T. Masubuchi54, M. E. Mattson57, P. Mazzanti5, K. S. McFarland48, P. McIntyre52, R. McNulty29,c, A. Mehta29, P. Mehtala23, S. Menzemer11,e, A. Menzione45, P. Merkel47, C. Mesropian49, A. Messina35, T. Miao17, N. Miladinovic6, J. Miles32, R. Miller35, C. Mills22, M. Milnik26, A. Mitra1, G. Mitselmakher18, H. Miyake54, S. Moed22, N. Moggi5, C. S. Moon27, R. Moore17, M. J. Morello45, P. Movilla Fernandez28, J. Mülmenstädt28, A. Mukherjee17, Th. Muller26, R. Mumford25, P. Murat17, M. Mussini5, J. Nachtman17, Y. Nagai54, A. Nagano54, J. Naganoma56, K. Nakamura54, I. Nakano39, A. Napier55, V. Necula16, C. Neu44, M. S. Neubauer24, J. Nielsen28,‡‡, L. Nodulman2, M. Norman9, O. Norniella24, E. Nurse30, S. H. Oh16, Y. D. Oh27, I. Oksuzian18, T. Okusawa40, R. Oldeman29, R. Orava23, K. Osterberg23, S. Pagan Griso42, C. Pagliarone45, E. Palencia17, V. Papadimitriou17, A. Papaikonomou26, A. A. Paramonov13, B. Parks38, S. Pashapour33, J. Patrick17, G. Pauletta53, M. Paulini12, C. Paus32, D. E. Pellett7, A. Penzo53, T. J. Phillips16, G. Piacentino45, J. Piedra43, L. Pinera18, K. Pitts24, C. Plager8, L. Pondrom58, X. Portell3, O. Poukhov15, N. Pounder41, F. Prakoshyn15, A. Pronko17, J. Proudfoot2, F. Ptohos17,b, G. Punzi45, J. Pursley58, J. Rademacker41,§, A. Rahaman46, V. Ramakrishnan58, N. Ranjan47, I. Redondo31, B. Reisert17, V. Rekovic36, P. Renton41, M. Rescigno50, S. Richter26, F. Rimondi5, L. Ristori45, A. Robson21, T. Rodrigo11, E. Rogers24, S. Rolli55, R. Roser17, M. Rossi53, R. Rossin10, P. Roy33, A. Ruiz11, J. Russ12, V. Rusu17, H. Saarikko23, A. Safonov52, W. K. Sakumoto48, G. Salamanna50, O. Saltó3, L. Santi53, S. Sarkar50, L. Sartori45, K. Sato17, A. Savoy-Navarro43, T. Scheidle26, P. Schlabach17, E. E. Schmidt17, M. A. Schmidt13, M. P. Schmidt59,*, M. Schmitt37, T. Schwarz7, L. Scodellaro11, A. L. Scott10, A. Scribano45, F. Scuri45, A. Sedov47, S. Seidel36, Y. Seiya40, A. Semenov15, L. Sexton-Kennedy17, A. Sfyrla20, S. Z. Shalhout57, M. D. Shapiro28, T. Shears29, P. F. Shepard46, D. Sherman22, M. Shimojima54,h, M. Shochet13, Y. Shon58, I. Shreyber20, A. Sidoti45, P. Sinervo33, A. Sisakyan15, A. J. Slaughter17, J. Slaunwhite38, K. Sliwa55, J. R. Smith7, F. D. Snider17, R. Snihur33, M. Soderberg34, A. Soha7, S. Somalwar51, V. Sorin35, J. Spalding17, F. Spinella45, T. Spreitzer33, P. Squillacioti45, M. Stanitzki59, R. St. Denis21, B. Stelzer8, O. Stelzer-Chilton41, D. Stentz37, J. Strologas36, D. Stuart10, J. S. Suh27, A. Sukhanov18, H. Sun55, I. Suslov15, T. Suzuki54, A. Taffard24,††, R. Takashima39, Y. Takeuchi54, R. Tanaka39, M. Tecchio34, P. K. Teng1, K. Terashi49, J. Thom17,a, A. S. Thompson21, G. A. Thompson24, E. Thomson44, P. Tipton59, V. Tiwari12, S. Tkaczyk17, D. Toback52, S. Tokar14, K. Tollefson35, T. Tomura54, D. Tonelli17, S. Torre19, D. Torretta17, S. Tourneur43, W. Trischuk33, Y. Tu44, N. Turini45, F. Ukegawa54, S. Uozumi54, S. Vallecorsa20, N. van Remortel23, A. Varganov34, E. Vataga36, F. Vázquez18,f, G. Velev17, C. Vellidis45,†, V. Veszpremi47, M. Vidal31, R. Vidal17, I. Vila11, R. Vilar11, T. Vine30, M. Vogel36, I. Volobouev28,k, G. Volpi45, F. Würthwein9, P. Wagner44, R. G. Wagner2, R. L. Wagner17, J. Wagner-Kuhr26, W. Wagner26, T. Wakisaka40, R. Wallny8, S. M. Wang1, A. Warburton33, D. Waters30, M. Weinberger52, W. C. Wester, III17, B. Whitehouse55, D. Whiteson44,††, A. B. Wicklund2, E. Wicklund17, G. Williams33, H. H. Williams44, P. Wilson17, B. L. Winer38, P. Wittich17,a, S. Wolbers17, C. Wolfe13, T. Wright34, X. Wu20, S. M. Wynne29, A. Yagil9, K. Yamamoto40, J. Yamaoka51, T. Yamashita39, C. Yang59, U. K. Yang13,g, Y. C. Yang27, W. M. Yao28, G. P. Yeh17, J. Yoh17, K. Yorita13, T. Yoshida40, G. B. Yu48, I. Yu27, S. S. Yu17, J. C. Yun17, L. Zanello50, A. Zanetti53, I. Zaw22, X. Zhang24, Y. Zheng8,‡, and S. Zucchelli5 (CDF Collaboration)
1Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China 2Argonne National Laboratory, Argonne, Illinois 60439 3Institut de Fisica d’Altes Energies, Universitat Autonoma de Barcelona, E-08193, Bellaterra (Barcelona), Spain 4Baylor University, Waco, Texas 76798 5Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40127 Bologna, Italy 6Brandeis University, Waltham, Massachusetts 02254 7University of California, Davis, Davis, California 95616 8University of California, Los Angeles, Los Angeles, California 90024 9University of California, San Diego, La Jolla, California 92093 10University of California, Santa Barbara, Santa Barbara, California 93106 11Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander, Spain 12Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 13Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 14Comenius University, 842 48 Bratislava, Slovakia; Institute of Experimental Physics, 040 01 Kosice, Slovakia 15Joint Institute for Nuclear Research, RU-141980 Dubna, Russia 16Duke University, Durham, North Carolina 27708 17Fermi National Accelerator Laboratory, Batavia, Illinois 60510 18University of Florida, Gainesville, Florida 32611 19Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy 20University of Geneva, CH-1211 Geneva 4, Switzerland 21Glasgow University, Glasgow G12 8QQ, United Kingdom 22Harvard University, Cambridge, Massachusetts 02138 23Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland 24University of Illinois, Urbana, Illinois 61801 25The Johns Hopkins University, Baltimore, Maryland 21218 26Institut für Experimentelle Kernphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany 27Center for High Energy Physics: Kyungpook National University, Daegu 702-701, Korea; Seoul National University, Seoul 151-742, Korea; Sungkyunkwan University, Suwon 440-746, Korea; Korea Institute of Science and Technology Information, Daejeon, 305-806, Korea; Chonnam National University, Gwangju, 500-757, Korea 28Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720 29University of Liverpool, Liverpool L69 7ZE, United Kingdom 30University College London, London WC1E 6BT, United Kingdom 31Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, E-28040 Madrid, Spain 32Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 33Institute of Particle Physics: McGill University, Montréal, Canada H3A 2T8; and University of Toronto, Toronto, Canada M5S 1A7 34University of Michigan, Ann Arbor, Michigan 48109 35Michigan State University, East Lansing, Michigan 48824 36University of New Mexico, Albuquerque, New Mexico 87131 37Northwestern University, Evanston, Illinois 60208 38The Ohio State University, Columbus, Ohio 43210 39Okayama University, Okayama 700-8530, Japan 40Osaka City University, Osaka 588, Japan 41University of Oxford, Oxford OX1 3RH, United Kingdom 42University of Padova, Istituto Nazionale di Fisica Nucleare, Sezione di Padova-Trento, I-35131 Padova, Italy 43LPNHE, Universite Pierre et Marie Curie,IN2P3-CNRS, UMR7585, Paris, F-75252 France 44University of Pennsylvania, Philadelphia, Pennsylvania 19104 45Istituto Nazionale di Fisica Nucleare Pisa, Universities of Pisa, Siena and Scuola Normale Superiore, I-56127 Pisa, Italy 46University of Pittsburgh, Pittsburgh, Pennsylvania 15260 47Purdue University, West Lafayette, Indiana 47907 48University of Rochester, Rochester, New York 14627 49The Rockefeller University, New York, New York 10021 50Istituto Nazionale di Fisica Nucleare, Sezione di Roma 1, University of Rome “La Sapienza”, I-00185 Roma, Italy 51Rutgers University, Piscataway, New Jersey 08855 52Texas A&M University, College Station, Texas 77843 53Istituto Nazionale di Fisica Nucleare, University of Trieste/Udine, Italy 54University of Tsukuba, Tsukuba, Ibaraki 305, Japan 55Tufts University, Medford, Massachusetts 02155 56Waseda University, Tokyo 169, Japan 57Wayne State University, Detroit, Michigan 48201 58University of Wisconsin, Madison, Wisconsin 53706 59Yale University, New Haven, Connecticut 06520
See Also:
Publisher's Note
Received 1 April 2008; published 25 September 2009; corrected 28 September 2009
We report on a search for the process pp̅ →γ+W/Z with W/Z→qq̅ in events containing two jets and a photon at the center-of-mass energy √s=1.96 TeV, using 184 pb-1 of data collected by the CDF II detector. A neural network event selection has been developed to optimize the rejection of the large QCD production background; it is shown that this method gives a significant improvement in both signal-to-noise ratio and signal sensitivity, as compared with an event selection based on conventional cuts. An upper limit is presented for the γ+W/Z production cross section with the W and Z decaying hadronically.
© 2009 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.80.052011
DOI:
10.1103/PhysRevD.80.052011
PACS:
12.15.Ji, 13.38.Dg, 13.85.Qk, 13.87.Fh
*Deceased. †Visitors from University of Athens, 15784 Athens, Greece. ‡Visitors from Chinese Academy of Sciences, Beijing 100864, China. §Visitors from University of Bristol, Bristol BS8 1TL, United Kingdom. **Visitors from University Libre de Bruxelles, B-1050 Brussels, Belgium. ††Visitors from University of California Irvine, Irvine, CA 92697, USA. ‡‡Visitors from University of California Santa Cruz, Santa Cruz, CA 95064, USA. aVisitors from Cornell University, Ithaca, NY 14853, USA. bVisitors from University of Cyprus, Nicosia CY-1678, Cyprus. cVisitors from University College Dublin, Dublin 4, Ireland. dVisitors from University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom. eVisitors from University of Heidelberg, D-69120 Heidelberg, Germany. fVisitors from Universidad Iberoamericana, Mexico D.F., Mexico. gVisitors from University of Manchester, Manchester M13 9PL, England. hVisitors from Nagasaki Institute of Applied Science, Nagasaki, Japan. iVisitors from University de Oviedo, E-33007 Oviedo, Spain. jVisitors from Queen Mary, University of London, London, E1 4NS, England. kVisitors from Texas Tech University, Lubbock, TX 79409, USA. lVisitors from IFIC (CSIC-Universitat de Valencia), 46071 Valencia, Spain.
See Also
Publisher's Note:
T. Aaltonen et al.,
Publisher’s Note: Search for hadronic decays of W and Z bosons in photon events in pp̅ collisions at √s=1.96 TeV [Phys. Rev. D 80, 052011 (2009)],
Phys. Rev. D 80, 079901 (2009).
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